# PDF Splitter + PDF Merge vs UnderText

The clearest difference is update cadence: UnderText at weekly against PDF Splitter + PDF Merge's every 3 months. PDF Splitter + PDF Merge's advantage is device support (4 vs 1) and iOS requirement (13.0 vs 26.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. PDF Splitter + PDF Merge sells 2 one-off in-app purchases and UnderText sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

PDF Splitter + PDF Merge ships an update every 3 months, UnderText weekly. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | PDF Splitter + PDF Merge | UnderText |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (139 ratings)](https://appshunter.io/ios/app/pdf-splitter-plus-pdf-merge/id651952889/reviews)** | — |
| Number of ratings | **139** | — |
| Positive reviews | 88.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 5 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [青青 余](https://appshunter.io/developer/633344484) | [Xuan Tuan Nguyen](https://appshunter.io/developer/1851803746) |

## What reviewers say

### PDF Splitter + PDF Merge

[App page](https://appshunter.io/ios/app/pdf-splitter-plus-pdf-merge/id651952889)

Easily combine multiple PDF files into a single document or extract specific pages from existing PDFs. This tool supports merging password-protected files if the password is known.

**Highlights:** Extract pages from PDF, Merge specified pages of multiple PDFs, Merge password-protected PDFs, Combine PDFs into one

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock（without restriction） | $3.99 | one-time |
| Unlock iOS without restriction | $3.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 🚀 Quick and efficient
- 🚀 Intuitive interface
- 👍 Reliable and consistent
- 👍 Excellent value for free app

**What reviewers complain about**

- 🐛 Issues with sorting/reordering files
- 🐛 Limitations on number of files
- 🔧 Outdated or basic interface design
- 💰 Requests payment after trial period

**Reported bugs**

- Corrupts text in merged PDF documents
- Paid version does not work as expected

**Requested features**

- Add page preview functionality
- Allow merging of other file types (not just PDFs)
- Improve file sorting/reordering capabilities
- Provide more customization options


### UnderText

[App page](https://appshunter.io/ios/app/undertext/id6755081094)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UnderText Premium (monthly) | $2.99 | per month |
| UnderText Premium (Yearly) | $23.99 | per year |


## Frequently asked questions

### Is PDF Splitter + PDF Merge free?

PDF Splitter + PDF Merge is free to download, with in-app purchases available.

### Is UnderText free?

UnderText is free to download, with in-app purchases available.

### Do PDF Splitter + PDF Merge or UnderText have ads?

Neither PDF Splitter + PDF Merge nor UnderText shows ads.

### Which is updated more often, PDF Splitter + PDF Merge or UnderText?

PDF Splitter + PDF Merge ships an update every 3 months, and UnderText weekly. Most recently, PDF Splitter + PDF Merge was updated on October 14, 2026 and UnderText on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*